COF — Q3 2026 Financial Report Analysis

Overview

Capital One earned $3.54 billion in the third quarter of 2026 (quarter ended September 30), or $5.61 per diluted share, up from $3.19 billion and $4.83 a year earlier. Total net revenue rose 6.4% to $16.34 billion. Excluding acquisition amortization and integration costs for Discover and Brex, adjusted EPS was $6.69, against $5.95 a year ago.

The biggest change from last quarter is credit. The share of loans written off as uncollectable fell to 2.73% (annualized), from 3.23% in Q2 and 3.16% a year ago, and in the main US card book it dropped to 3.98% from 4.71% in Q2. Lower losses plus a $225 million reserve release kept the provision for credit losses roughly flat at $2.92 billion while revenue grew.

This report is written from the earnings release and financial supplement filed with the SEC on October 20, 2026 (8-K, Exhibits 99.1 and 99.2). The full 10-Q has not been filed yet, so the cash-flow statement and management's explanations of individual line items are not available. Where the supplement shows a number but doesn't explain it, this report says so.

A note on comparability

Capital One closed its Discover acquisition on May 18, 2025, so Q3 2025 already contains a full quarter of Discover. That makes this year-over-year comparison much cleaner than Q2's, which was distorted by the $8.8 billion reserve charge booked when Discover closed. Nine-month comparisons are still distorted: 2025's nine months include only about 4.5 months of Discover.

One newer deal does affect the comparison. Capital One closed its acquisition of Brex, a corporate-card and expense-management company, on April 7, 2026. Since Q2 2026, Brex and Capital One's own corporate card sit inside the Domestic Card business. Q3 2026 includes them; Q3 2025 does not. That inflates growth in card purchase volume, fees and expenses.

Key metrics

Some terms used above:

• Net interest income is what the bank earns on loans and securities minus what it pays on deposits and debt. Net interest margin (NIM) is that figure as an annualized share of interest-earning assets. Capital One's NIM is far above a typical bank's 3% because credit cards carry high interest rates.
• Efficiency ratio is non-interest expense divided by revenue. Lower is better.
• CET1 ratio is the highest-quality capital (mainly common equity) as a share of risk-weighted assets. It is the main cushion regulators look at. The Q3 figure is preliminary.
• Return on tangible common equity (ROTCE) is annualized profit for common shareholders divided by common equity excluding goodwill and intangible assets. Capital One reports it as a non-GAAP figure.

What drove revenue

Net interest income rose 3.9% from a year earlier to $12.89 billion, and 4% from Q2. Interest expense fell 8% from a year earlier, to $4.01 billion, as interest paid on deposits dropped 7% to $3.33 billion even though average deposits grew 3%. Interest income rose only 1%, so cheaper funding did more of the work than lending did. Compared with Q2, the 40-basis-point rise in NIM to 8.41% came mostly from the asset side. The average yield on Domestic Card loans rose to 17.66% from 17.16%, while the rate paid on interest-bearing deposits went up 3 bps to 2.94%.

Non-interest income rose 17% from a year earlier to $3.46 billion. Most of the increase was discount and interchange fees (what merchants pay when customers use a card), up 29% to $2.34 billion. Domestic Card purchase volume grew 11%, to $250 billion. Fees grew faster than volume. The supplement doesn't split out how much came from Brex, which wasn't in last year's quarter, or from Discover's network. The quarter also included a $40 million net loss on securities sales, the first in the five quarters shown.

Most loan books grew; personal loans shrank:

Auto is the fastest-growing book. Originations were $13.1 billion, up 22% from a year earlier.

Credit quality by business

Credit card lenders publish two main loss measures. The net charge-off rate is loans written off as uncollectable, net of later recoveries, as an annualized share of average loans. The 30+ day delinquency rate is the share of loans at least 30 days behind on payments. Delinquencies are an early warning for future charge-offs.

• Domestic Card had $2.56 billion of net charge-offs in the quarter: $3.77 billion of gross write-offs less $1.21 billion of recoveries. Capital One released $250 million of card reserves. Delinquencies rose from Q2 (3.39% to 3.74%), which is the usual seasonal pattern in the second half of the year, but stayed below last year's 3.89%. The supplement doesn't say how much of the 73 bps quarter-on-quarter drop in charge-offs is seasonal, from recoveries, or from portfolio sales. The 10-Q should show that.
• Auto is moving the other way from a year ago on losses. The charge-off rate rose to 1.59% from 1.43% in Q2 and 1.54% a year ago, and the company added $41 million to auto reserves. Delinquencies are lower than a year ago (4.64% vs 4.99%), so the rise in losses so far is modest.
• Commercial Banking had zero net charge-offs: $21 million of write-offs were fully offset by $21 million of recoveries. Nonperforming commercial loans fell to 1.22% from 1.39% a year ago.

The total allowance for credit losses (the reserve set aside for expected future losses) was $22.7 billion, or 4.92% of loans, down from 5.21% a year ago.

Segment results

The headline growth in profit did not come from the card business. Domestic Card earned 2.5% less than a year ago even though revenue rose 5.1%. Its expenses rose 9% to $5.56 billion, and its provision rose 7% to $2.31 billion. The expense line now includes Brex and its integration costs ($47 million this quarter), which last year's quarter didn't have.

Consumer Banking (retail deposits, auto loans and, per the release, the Global Payment Network acquired with Discover) did the most to lift profit growth. Its non-interest income rose 62% to $769 million from $475 million. The supplement doesn't explain the jump.

The Other segment (treasury and corporate items) lost $240 million less than a year ago, mostly because of taxes. It booked a $178 million tax benefit, compared with a $55 million tax charge in Q3 2025.

What the headline numbers hide

• EPS growth came mostly from tax and buybacks. Pre-tax income from continuing operations rose only 4.3%, to $4.57 billion from $4.38 billion. The effective tax rate fell to 22.6% from 27.1%, which lifted net income growth to 10.9%. Diluted shares fell 4.7% to 609.5 million, which lifted EPS growth to 16.1%. About three-quarters of the EPS increase came from below the operating line.
• Costs grew faster than revenue, even on the company's adjusted basis. Adjusted non-interest expense, which excludes deal-related items, rose 7.2% to $7.95 billion. Adjusted revenue rose 5.5% to $16.31 billion. The adjusted efficiency ratio worsened to 48.76% from 47.96%, and adjusted pre-provision earnings (revenue minus costs, before credit losses) rose only 3.8% to $8.36 billion. Some of that is Brex's cost base, which wasn't there a year ago. The release doesn't give Brex's revenue and expenses separately.
• The gap between GAAP and adjusted earnings is $1.08 per share every quarter. Adjusted EPS adds back $483 million of acquisition amortization (mostly the write-down of intangible assets bought with Discover), $338 million of Discover integration costs and $47 million of Brex integration costs, all pre-tax. Discover integration costs were higher than Q2's $298 million and close to last year's $348 million, so they aren't winding down yet. The amortization is a non-cash accounting charge that will continue for years. The integration costs are real cash spending.
• Tangible book value per share fell even though the bank was profitable. It fell 2% in the quarter to $102.72, down from $105.21 in Q2 and $105.18 a year ago. Accumulated other comprehensive loss widened by $3.7 billion in the quarter, to $10.0 billion. This line mainly tracks unrealized losses on securities and hedges, which aren't run through the income statement. Treasury stock also rose by $2.7 billion, consistent with continued buybacks at a price above book value. The supplement doesn't break down the comprehensive loss.
• Capital is being drawn down on purpose. CET1 was 13.8%, down from 14.4% a year ago. The tangible common equity ratio fell to 9.8% from 10.8%. Common shares outstanding fell to 601.5 million, from 613.5 million at the end of June. The quarterly dividend is $0.80, up from $0.60 a year ago.
• Cash conversion can't be checked yet. The supplement has no cash-flow statement. That will have to wait for the 10-Q.

Did last time's read hold up?

Our Q2 2026 report flagged three things to watch going into Q3:

• Card yields vs funding costs. NIM did not flatten. It rose 40 bps to 8.41%, and Domestic Card yields recovered to 17.66% from 17.16%. They are still below last year's 17.99%. The risk we flagged was a squeeze from deposit costs, and that didn't happen: the deposit rate rose only 3 bps.
• Auto credit. The trend continued. The auto charge-off rate rose again, to 1.59% from 1.43%, and reserves were built by another $41 million. It is still a small number next to card losses.
• Integration costs. They haven't stopped. Discover integration costs rose to $338 million in the quarter, from $298 million in Q2, so the cumulative total is now about $2.4 billion.

Outlook

The earnings release and supplement give no numeric guidance. The CEO's only forward-looking comment is that the Discover integration "continues to go well and we're making good progress on delivering the expected synergies," and that the company will "continue to invest."

Our read:

• Card credit has room to improve, but not this fast. A 3.98% Domestic Card charge-off rate is well below last year's 4.63%. Delinquencies are lower than a year ago, but they rose quarter on quarter, and Q4 and Q1 are seasonally the heaviest loss quarters. Expect the rate to move back up from Q3's level. Whether it stays below last year's 4.93% in Q4 is the test.
• Operating leverage is the weak spot. As long as adjusted expenses grow faster than adjusted revenue, profit growth depends on credit, tax and buybacks. Watch whether Brex adds revenue in line with its costs, and whether Discover integration spending finally starts to fall.
• Capital return should continue, but the cushion is thinner. CET1 is 13.8% and the TCE ratio is below 10%. Buybacks on the scale of Q3's (treasury stock up about $2.7 billion) are easier to sustain while ROTCE is above 20%, as it was this quarter at 21.1%. If losses rise, the room for buybacks shrinks.

Takeaway: Capital One's 16% EPS growth rests mainly on much lower card losses, a lower tax rate and 5% fewer shares. The underlying engine grew slowly: adjusted pre-provision earnings were up 3.8%, and the Domestic Card segment earned slightly less than a year ago because costs, including Brex, rose faster than revenue. The quarter is good on credit and modest on operations.